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A188818 Number of n X n binary arrays without the pattern 0 1 diagonally or antidiagonally 1
2, 9, 48, 256, 1360, 7056, 36000, 179776, 884256, 4276624, 20432608, 96353856, 449990080, 2080089664, 9540782208, 43403888896, 196212020800, 881112632976, 3936117388896, 17487049789504, 77350773736512, 340574032803904 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A188824

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..32

EXAMPLE

Some solutions for 3X3

..0..1..0....1..1..1....1..1..1....1..0..1....1..0..1....1..0..1....1..1..0

..1..0..0....1..1..0....0..1..0....0..1..0....0..1..0....0..1..0....1..0..1

..0..0..0....1..0..1....0..0..0....1..0..1....0..0..0....1..0..0....0..0..0

CROSSREFS

Sequence in context: A223832 A323958 A306356 * A047139 A190315 A190253

Adjacent sequences:  A188815 A188816 A188817 * A188819 A188820 A188821

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 11 2011

STATUS

approved

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Last modified May 25 20:58 EDT 2020. Contains 334597 sequences. (Running on oeis4.)